linux-kernel - Re: [PATCH v2 1/2] media: i2c: st_mipid02: cascade s

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Message-ID: <3f593961-ab8a-8498-9b34-1ce729a5f026@foss.st.com>
Date:   Tue, 25 Jul 2023 09:56:48 +0200
From:   Benjamin Mugnier <benjamin.mugnier@...s.st.com>
To:     Alain Volmat <alain.volmat@...s.st.com>,
        Sylvain Petinot <sylvain.petinot@...s.st.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
CC:     <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] media: i2c: st_mipid02: cascade s_stream call to
 the source subdev

Hi Alain,

Reviewed-By: Benjamin Mugnier <benjamin.mugnier@...s.st.com>

On 7/21/23 14:03, Alain Volmat wrote:
> Cascade the s_stream call to the source subdev whenever the bridge
> streaming is enable / disabled.
> 
> Signed-off-by: Alain Volmat <alain.volmat@...s.st.com>
> ---
> v2: correct uninitialized ret variable in mipid02_stream_disable
> 
>  drivers/media/i2c/st-mipid02.c | 13 ++++++++++++-
>  1 file changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/i2c/st-mipid02.c b/drivers/media/i2c/st-mipid02.c
> index 906553a28676..ee456bd4cf76 100644
> --- a/drivers/media/i2c/st-mipid02.c
> +++ b/drivers/media/i2c/st-mipid02.c
> @@ -545,7 +545,14 @@ static int mipid02_configure_from_code(struct mipid02_dev *bridge)
>  static int mipid02_stream_disable(struct mipid02_dev *bridge)
>  {
>  	struct i2c_client *client = bridge->i2c_client;
> -	int ret;
> +	int ret = -EINVAL;
> +
> +	if (!bridge->s_subdev)
> +		goto error;
> +
> +	ret = v4l2_subdev_call(bridge->s_subdev, video, s_stream, 0);
> +	if (ret)
> +		goto error;
>  
>  	/* Disable all lanes */
>  	ret = mipid02_write_reg(bridge, MIPID02_CLK_LANE_REG1, 0);
> @@ -633,6 +640,10 @@ static int mipid02_stream_enable(struct mipid02_dev *bridge)
>  	if (ret)
>  		goto error;
>  
> +	ret = v4l2_subdev_call(bridge->s_subdev, video, s_stream, 1);
> +	if (ret)
> +		goto error;
> +
>  	return 0;
>  
>  error:

-- 
Regards,

Benjamin